package letodms 3.3.11+dfsg.1-1 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1

[Michel §Goussu]

Unable to deinstall letodms

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: letodms 3.3.11+dfsg.1-1
ProcVersionSignature: Ubuntu 3.16.0-41.57~14.04.1-generic 3.16.7-ckt11
Uname: Linux 3.16.0-41-generic i686
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: i386
Date: Tue Jun 30 14:58:09 2015
DuplicateSignature: package:letodms:3.3.11+dfsg.1-1:subprocess installed pre-removal script returned error exit status 1
ErrorMessage: subprocess installed pre-removal script returned error exit status 1
InstallationDate: Installed on 2015-06-29 (1 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release i386 (20150218.1)
PackageArchitecture: all
SourcePackage: letodms
Title: package letodms 3.3.11+dfsg.1-1 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)